What is the super tech oil filter part number ST6607 for?

ST6607 works for many higher cc engines. I have a 08 Kawasaki Vulcan 900 Classic that I use that filter on. Your best bet is to search what you have in google, find a forum for that type and ask the pros on there. The ST6607 fitside v ariety WILL IT FIT 1800 GOLD WING